{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["machanical property", "engineering feature", "concept or principle", "material", "process parameter", "process characterization"], "input": "Certification of medical devices is required if there is a medium to high risk potential to the user ."}
{"machanical property": [], "engineering feature": [], "concept or principle": [], "material": [], "process parameter": [], "process characterization": []}